Accessibilitat ≠ Overlay: HTML semàntic, la base que un overlay no pot substituir
A site can look perfectly organised and still be confusing to someone using a screen reader, keyboard or other assistive technology. The reason may be invisible: HTML. Elements such as <main>, <nav>, <button>, <label> and headings carry meaning, not just appearance.
Semàntica vol dir comunicar què és cada cosa
Two pieces of text can look identical but mean different things to the browser. An <h2> identifies a section; a CSS-enlarged <p> remains a paragraph. W3C explains that well-marked structure supports navigation and orientation.
Encapçalaments i regions són navegació
Headings communicate content organisation. Elements such as <header>, <nav>, <main>, <aside> and <footer> identify regions that screen readers and other tools can use for efficient navigation.
Un botó ha de ser un botó
A native <button> already provides known semantics and behaviour. Recreating one with a <div> means rebuilding semantics, focus and keyboard behaviour. The first rule of ARIA recommends native HTML when an appropriate element exists.
Els formularis necessiten relacions reals
Visually placing “Email” beside a field is not enough. W3C recommends associating labels with controls, normally with <label>, so assistive technologies can identify the field purpose.
ARIA complementa; no substitueix HTML correcte
ARIA is essential when native HTML cannot provide required semantics, especially in complex interfaces. It is not intended to replace correct HTML unnecessarily, and incorrect ARIA can alter the semantics exposed to assistive technology.
Què troba un overlay quan arriba tard
A layer running after page load acts on a structure that already exists. If the base contains incorrect elements, missing relationships or poorly built custom components, the problem began before the overlay. Building correctly at source and testing with assistive technology is more robust.
I Blind Reader?
Blind Reader és tecnologia d’assistència per ajudar la persona usuària. Pot facilitar accés o interacció, però el web continua necessitant una estructura comprensible. Blind Reader ajuda l’usuari; no substitueix l’HTML semàntic ni certifica el web.
Construir bé abans d’afegir capes
Semantics are not an invisible technical detail; they are part of the user experience. Before adding a layer that interprets or transforms the page, use the right element for each function. Accessibility starts in the code.
Fuentes / Sources
W3C WAI — Page Structure Tutorial
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